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Genetic variation in prehistoric Sardinia.
David Caramelli1, Cristiano Vernesi, Simona Sanna
1Dipartimento di Biologia Animale e Genetica, Laboratorio di Antropologia, Università di Firenze, Firenze, Italy.
Human Genetics
|July 17, 2007
Summary
Ancient Sardinian (Nuragic) mitochondrial DNA reveals low genetic diversity, suggesting maternal lineage expansion. This ancient DNA study supports clear genealogical continuity from the Late Bronze Age to modern Sardinians.
Area of Science:
- Genetics
- Archaeology
- Ancient DNA Analysis
Background:
- Investigating the genetic landscape of ancient Sardinian populations (Nuragic civilization) during the Late Bronze Age and Iron Age.
- Analyzing mitochondrial DNA (mtDNA) control region sequences from 23 individuals to understand population history and relationships.
Observation:
- Nuragic samples exhibited significantly lower genetic diversity compared to ancient Iberians and Etruscans.
- A substantial proportion of Nuragic mtDNA sequences showed exact matches with modern Sardinian populations.
- Ancient Sardinian gene pools displayed sharp differences among modern samples, contrasting with low diversity within ancient samples.
Findings:
- Established clear genealogical continuity between the ancient Nuragic population and contemporary Sardinians.
- Nuragic populations align with a broad, geographically unstructured cluster of modern European populations.
- Low ancient genetic diversity supports a model of expansion from a small, maternally related ancestral group.
Implications:
- Provides crucial insights into the peopling of Sardinia and the genetic history of its inhabitants.
- Highlights the role of maternal lineages in shaping Sardinian population genetics over millennia.
- Suggests recent differentiation of Sardinian gene pools, potentially linked to post-Nuragic demographic events.
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